UL 1-2012 pdf download – Flexible Metal Conduit.
1 0.2 The copper sulphate solution is to be made from distilled water and the American Chemical Society (ACS) reagent grade of cupric sulphate (CuSO 4 ). In a copper container or in a glass, polyethylene, or other chemically nonreactive container in which a bright piece of copper is present, a quantity of the cupric sulphate is to be dissolved in hot distilled water to obtain a solution that has a specific gravity slightly higher than 1 .1 86 after the solution is cooled to a temperature of 1 8.3°C (65.0°F). Any free acid that might be present is to be neutralized by the addition of approximately 1 gram of cupric oxide (CuO) or 1 gram of cupric hydroxide [Cu(OH) 2 ] per liter of solution. The solution is to be diluted with distilled water to obtain a specific gravity of exactly 1 .1 86 at a temperature of 1 8.3°C (65.0°F). The solution is then to be filtered. 1 0.3 At one end of a sample length of finished steel conduit, the conduit is to be unwound from the outside to expose both edges and the inner surface of the formed strip and to facilitate working cheesecloth between the turns onto the inner surface to dry that surface during the test. To reduce the damage to the zinc coating, the strip is not to be straightened as it is unwound but is to remain in the helical form with a diameter no larger than three times the conduit diameter. Three 6-inch (1 50-mm) – axial measurement – specimens are to be cut from the partially uncoiled conduit. Additionally, three straight 6-inch (1 50-mm) specimens are to be cut from a sample length of the zinc-coated steel before forming.
17.3 Tag 1 7.3.1 The following statement or its equivalent shall be marked on a tag attached to each coil of aluminum or steel reduced-wall flexible metal conduit (RWFMC) or extra reduced-wall flexible metal conduit (XRWFMC). ″When applying setscrew-type connectors, care should be taken not to damage the conduit″. 1 7.3.2 Each coil of flexible steel and aluminum conduit shall be marked or tagged to indicate the following plainly: a) The name of the manufacturer, that manufacturer’s trade name for the conduit, or both, or any other acceptable distinctive marking by means of which the organization responsible for the conduit can readily be identified. b) The date of manufacture by month and year. c) The trade size of the conduit. d) ″Use only with connectors intended for this type of conduit. ″ Cartons for these connectors are marked as follows: Connectors for use with FMC (flexible metal conduit): ″For FMC″ or ″FMC″ Connectors for use with steel (FE) or aluminum (AL) FMC only: ″For FE FMC″ or ″FEFMC″ ″For STEEL FMC″ or ″STEELFMC″ ″For AL FMC″ or ″ALFMC″ ″For ALUM FMC″ or ″ALUMFMC″